xamarin localhost connection refused

Quick summary: The Android build gives a "ConnectFailure (Connection Refused)" error when attempting to send an HTTP request to the hosted API. It is possible to configure the Windows Firewall to disallow outbound connections, but the default setting is to allow all outbound connections. For more information, see, Specify the address of your local machine. as mason and Jason suggested, I probably have to use the proper IP instead of "localhost". Not the answer you're looking for? Not the answer you're looking for? Therefore, given a local secure web service that exposes a GET operation via the /api/todoitems/ relative URI, an application running on the Android emulator can consume the operation by sending a GET request to https://10.0.2.2:/api/todoitems/. A .NET MAUI app running in the Android emulator or iOS simulator can consume an ASP.NET Core web service that's running locally over HTTP. Yes, it really was just that. Making statements based on opinion; back them up with references or personal experience. If your Web Service is hosted by IIS, then you will need to do some extra setup in order to accept requests coming from external devices or servers. The resulting HttpClientHandler object should be passed as an argument to the HttpClient constructor for debug builds: Optionally, you can configure your iOS and Android projects to allow clear-text HTTP traffic. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. When running a mobile application in the iOS simulator from Windows, the application is displayed in the remoted iOS simulator for Windows. To: xamarinhq/app-evolve app-evolve@noreply.github.com Well if you're running an ASP.NET website on a server, and your Xamarin app is running on an Android device, then they're not running on the same machine. Connect and share knowledge within a single location that is structured and easy to search. In Visual Studio 2015 and earlier make sure that you are on the same distribution channel on both IDEs. https://azure.microsoft.com/en-us/documentation/articles/app-service-mobile-xamarin-ios-get-started/#optional-test-your-backend-project-locally. For more information, see Android network security configuration and iOS ATS configuration. }. Recommended fix: Delete id_rsa and id_rsa.pub from %LOCALAPPDATA%\Xamarin\MonoTouch, and then reconnect to the Mac build host. Xamarin 4.1 security feature This error will happen if you downgrade to Xamarin 4.0 after using Xamarin 4.1 or higher. (**) - Please, look at the "EDIT" at the bottom of the question. at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess You can deploy the backend service to IIS on your PC, on a different local PC, or on your machine as an app running under Visual Studio (IIS Express) . 785 12 27 asked Jun 30, 2015 at 7:02 jayeshmon kj 331 1 3 3 Looks like this has nothing to do with your code, the address you are trying to reach; http://localhost:49836 is unreachable. (Ep. System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () Configure Firewall of your system, to allow http requests to come in. Conclusions from title-drafting and question-content assistance experiments How to resolve "Connection Refused" from .NET HttpClient when URL works fine from browser, Connecting to a RESTful API from Xamarin.Forms mobile application (and other computers on the same network), Can't connect to api endpoint from mobile app, Problem with connecting to REST Api by HTTPS from Xamarin forms - Android phone, StatusCode 400 "Bad request" when Connecting a Xamarin.forms app on a physical Phone to an Asp.net REST API, Xamarin iOS won't connect to Rest API from a Simulator, Http Request throws 'Connection Refused' error from actual device on xamarine, Xamarin App cannot call APIs on LocalHost, Xamarin forms app Connection to Asp.net core web Api, How Does Military Budgeting Work? (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156 Workaround: Move the .bashrc file to a backup location (or delete it if you know you don't need it). The content you requested has been removed. The log files can be located by browsing to Help > Xamarin > Zip Logs in Visual Studio. This works for UWP and iOS, but Android always comes up with an ERR CONNECTION REFUSED. /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/System/System.Net/WebConnection.cs:195 I created a NetCore 3.1 rest api that serves as the backend to my Xamarin mobile app. Hi @Jason yeah. From: Pinox [mailto:notifications@github.com] This section only applies if you have already connected successfully to the Mac build host with your Mac username and password using the OpenSSH SSH client, as discussed in steps 8 and 9 above. Could it be RestSharp? Run the following command in the command prompt to launch Visual Studio with verbose logging: Attempt to connect to the build host from Visual Studio. When run locally you will experience near zero latency for table storage operations. Connection refused ValidIssuers = new[] { "http://localhost" }, When running a .NET MAUI app in the iOS simulator from Windows, the app is displayed in the remote iOS simulator for Windows. It was. To view the Xamarin messages in the Output window: If the Output window does not include enough information to diagnose the problem, the log files are the next place to look. at Any help is appreciated. Connecting to localhost over HTTPS from simulators and emulators (revisited). Zerk caps for trailer bearings Installation, tools, and supplies. Any help would be great! The DeviceInfo class can be used to detect the platform the app is running on. Historical installed base figures for early lines of personal computer? After Visual Studio hits the connection error, collect the logs from Help > Xamarin > Zip Logs. For more information, see, Bypass the local development certificate security check. The log files contain additional diagnostic messages that do not appear in the Output window. promise, System.Boolean requiresSynchronization) [0x00014] in That got me thinking that maybe there's a native Java exception bubbling up, that AndroidClientHandlerdoesn't catch. With a little help from this other older thread, I was able to get it working: https://forums.xamarin.com/discussion/42345/simple-android-http-listener-not-working, Have you tried to use 10.0.2.2 instead of localhost? I followed this Is this subpanel installation up to code? So then I started to look at the code for the AndroidClientHandlerclass (in the Mono.Android repo), in the hope of finding an obvious property that needed setting, or method that needed calling. The Overflow #186: Do large language models know what theyre talking about? For more information, see. I would like to: A. Connect to localhost to debug the rest api from the Simulators System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing. Finally, check the Turn off Windows Defender Firewall checkbox and click OK. See for example unix.stackexchange.com/questions/56941/what-is-the-point-of-sshd-usedns-option. Therefore, there's no localhost access to a web service running in Windows for an iOS app running on a Mac. If Visual Studio hits an error when connecting to the build host, there are 2 locations to check for additional messages: the Output window and the log files. The iOS simulator uses the host machine network. The Overflow #186: Do large language models know what theyre talking about? Then I created a Xamarin.Android client (*). Android device is a client. Visual Studio now automatically deploys the agent over Remote Login and runs it in the background. From: Pinox [mailto:notifications@github.com] I've not had an issue making HTTP requests with other apps, just this one. UWP build works fine (no connection issues at all), Android build has INTERNET permission set, I don't get a permission notification though when running the app, I'm using RestSharp to build and send the HTTP requests (v106.5.4). [0x003ce] in Sent: Friday, June 17, 2016 7:42 AM The iOS simulator uses the host machine network. The android emulator runs under Hyper-V , so not sure if it is specific to my setup , I will check with perhaps the Xamarin Emulator on a different machine. As long as you have confirmed that both Mac and Windows are updated to the same Xamarin distribution channel, this warning is ignorable. at System.Runtime.CompilerServices.TaskAwaiter.GetResult () [0x00000] Is there an identity between the commutative identity and the constant identity? By default, new iOS platform projects use the NSUrlSession network stack, to support TLS 1.2, and use native APIs for better performance and smaller executable size. As far as your app is concerned, the server is remote, not local. The latter is my preferred approach. .NET Multi-platform App UI (.NET MAUI) apps that run on Windows or MacCatalyst can consume ASP.NET Core web services that are running locally over HTTP or HTTPS without any additional work, provided that you've trusted your development certificate. /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 Attempting to invoke a local secure web service from an application running in the iOS simulator or Android emulator will result in a HttpRequestException being thrown, even when using the managed network stack on each platform. right now i have another problem:-- result = {StatusCode: 400, ReasonPhrase: 'Bad Request', Version: 1.1, Content: System.Net.Http.StreamContent, Headers: { Server: Microsoft-HTTPAPI/2.0 Date: Wed, 01 Jul 2015 05:57:12 GMT Connection: close Content-Type: text/html; charset=us-ascii Content-Lengt i need help statuscode :- 400,any other settings are required for connecting web api. How terrifying is giving a conference talk? If step 8 fails and step 10 fails, then the problem is likely that the SSH server process on the Mac is not running or is not configured to allow the current user to log in. /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/System.Net.Http/System.Net.Http/HttpClientHandler.cs:379, --- End of stack trace from previous location where exception was thrown --- at /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/System/System.Net.Sockets/Socket.cs:1313 The exception is pretty big. That also didn't help. Xamarin Forms SSL Authentication failed. I am using MVVM Prism for the Xamarin mobile app. (Ep. First, you can run the back end service on Azure, especially if you are the only developer. The Xamarin Build Host from older versions of Xamarin.iOS is no longer required. Excel Needs Key For Microsoft 365 Family Subscription. Given your difficult Internet situation, you could speed things up even further by running the Azure Storage Emulator on your machine. From: Pinox [mailto:notifications@github.com] Excel Needs Key For Microsoft 365 Family Subscription. at System.Threading.Tasks.TaskFactory1[TResult].FromAsyncCoreLogic (IAsyncResult iar, System.Func2 endFunction, System.Action1 endAction, System.Threading.Tasks.Task1 promise, Boolean requiresSynchronization) [0x00014] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/threading/Tasks/FutureFactory.cs:550 Be sure to double-check step 3. If your log files show a problem during the "Installing", "Uploading", or "Starting" steps for any of Mac agents, you can try deleting the XMA cache folder to force Visual Studio to re-upload them. To enable clear-text local traffic on Android you must create a network security configuration file. For all of the remaining steps, be sure to use the location that does not return "No such file or directory". Some further details/things I have tried: Therefore, it's necessary to ignore SSL errors when an app consumes a local secure web service. https://developer.android.com/studio/run/emulator-networking. How "wide" are absorption and emission lines? Ask Question Asked 6 years, 5 months ago Modified 6 years, 5 months ago Viewed 4k times 2 (**) I created an ASP.NET web server, hosting SignalR hub. Where to start with a large crack the lock puzzle like this? Why does tblr not work with commands that contain &? These files contain the same messages in two slightly different formats. Run cp /etc/ssh/sshd_config "$HOME/Desktop/" in Terminal to copy the file to your desktop. When switched to a RELEASE build, the sample app wouldn't retrieve any data from the web service, but provided no indication why not. This can be achieved by adding a new XML file named network_security_config.xml to the Platforms\Android\Resources\xml folder in your .NET MAUI app project. Bug #35971 Some users have run across this error when using a wireless network connection between the Mac build host and Windows. I thought doing development should include running the backend and client apps of Xamarin/Azure on your pc , obviously not ;)) I think I need a faster internet connection because doing debugging to the cloud is painfully slow IMHO. The appropriate hostname, that enables access to local secure web services, can then be set as follows: For more information about the DeviceInfo class, see Xamarin.Essentials: Device Information. Here is simple code which running in my case (start from simple and then go next), i solved this problem by using IP address not use localhost, Try changing your Hosts file adding a new hostname to 127.0.0.1. The only internet traffic will be the calls out to Azure tables, the Azure Notification Hub and other things like Google if you are using map services. In the code that defines the URL of your local web service in your .NET MAUI app, ensure that the web service URL specifies the HTTP scheme, and the correct hostname. System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[TResult].GetResult What does a potential PhD Supervisor / Professor expect when they ask you to read a certain paper? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. at By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. Ensure that both machines are on the same Local Network. Obviously this is only for a development purposes. ValidIssuers = new[] { "http://localhost" }, I'm struggling to find that IP, it's somewhere in Android Settings. Possible workaround: Manually add the Mac using the IP address. Restart Your Network Adapter. Make sure you are connecting to the Mac with the username rather than the Full Name. The process to enable this is as follows: Installing the .NET Core SDK installs the ASP.NET Core HTTPS development certificate to your local user certificate store. Proving that the ratio of the hypotenuse of an isosceles right triangle to the leg is irrational. rev2023.7.14.43533. On iOS, the GetPlatformMessageHandler method returns a NSUrlSessionHandler object that sets its TrustOverrideForUrl property to a delegate named IsHttpsLocalHost that matches the signature of the NSUrlSessionHandler.NSUrlSessionHandlerTrustOverrideForUrlCallback delegate. (System.IAsyncResult iar, System.Func2[T,TResult] endFunction, Instead of using localhost in the URL, you'd include the IP address or DNS name of your server. All debugging is local. If you are not running the backend service somewhere then you need to do that. /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:535 I am using NetCore Kestrel instead of IIS to host the rest api in the localhost. Confirm the location of the sshd_config file by running ls /etc/ssh/sshd_config and ls /etc/sshd_config in a Terminal command prompt. It displays messages about the main connection steps and errors. (Starting with Xamarin 4.1, errors in the .bashrc file will no longer affect the connection process.) To trust the certificate, perform the following one-time step to run the dotnet dev-certs tool: The following command provides help on the dev-certs tool: Alternatively, when you run an ASP.NET Core 2.1 project (or above), that uses HTTPS, Visual Studio will detect if the development certificate is missing and will offer to install it and trust it. @Ehsad Mirsaeedi I wish you had given a more complete answer of how to exactly do each of these things so that everybody could use it. Deleting the configuration file (/Library/Preferences/com.apple.alf.plist) and rebooting the computer can help restore the default behavior. Thanks again for the reply. Instead of RestSharp, you can use the HttpClient class from the System.Net.Http namespace. Processes from previous build host connections can sometimes interfere with the behavior of the current active connection. Xamarin: Connect to locally hosted web service. This avoids a known limitation for full names that include accented characters. in Connection to local web service from xamarin Vs2015 android emulator, A web application and Xamarin.Android app communicating to a Service/API, Cannot connect to webservice hosted on localhost from UWP app, Unable to connect to a Web Service in Xamarin.Android(C#). Thanks Tom , that is exactly how i also like todo things. For more information, see, Configure your project to use the appropriate, Specify the address of your local machine. Many mobile and desktop apps consume web services. I can connect to the API via the browser on the device. @Jason ok but then how to debug the rest api? It should also serve as a reminder to myself when I encounter this problem again in future. How "wide" are absorption and emission lines? rev2023.7.14.43533. Reference text on Reichenbach's or Klein's work on the formal semantics of tense, Excel Needs Key For Microsoft 365 Family Subscription. Because it points to an IP and not localhost, you need to go into your project solution, in .vs folder->config->applicationhost.config and change this into , where 13142 is my port, yours may be different. --- End of inner exception stack trace --- at System.Net.HttpWebRequest.EndGetResponse (System.IAsyncResult Thanks Tom , James. if you have json data than you can not : Content-Type: text / html. /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/System/System.Net/HttpWebRequest.cs:1023 Subject: [xamarinhq/app-evolve] Running backend on localhost (#9), I have change the following => mock data = false and I changed the xamarin azure cloud string to http://localhost:51800 and inserted, ValidAudiences = new[] { "http://localhost" }, Thanks for contributing an answer to Stack Overflow! Bug Some users have seen this error when attempting to connect to the build host by double-clicking the name of the Mac in the connection dialog. However, the virtual router for each emulator manages a special network space that includes pre-allocated addresses, with the 10.0.2.2 address being an alias to your host loopback interface (127.0.0.1 on your development machine). Future society where tipping is mandatory. The idea is to ignore SSL errors on iOS/Android for local HTTPS services by setting the HttpClientHandler.ServerCertificateCustomValidationCallback property to a callback that ignores the result of the certificate security check for the localhost certificate. I've previously written several posts about connecting to localhost HTTPs services from Xamarin apps running on simulators and emulators. Does air in the atmosphere get friction due to the planet's rotation? What is the state of the art of splitting a binary file by size? If you encounter any trouble using automatic Mac In practise, I'm using a custom renderer, injecting Javascript to access platform features, etc. Conclusions from title-drafting and question-content assistance experiments Get method in xamarin.Android REST service, System.Net.WebException in android xamarin application, Error In XamarinAndroid "System.Net.Sockets.SocketException: Connection refused at System.Net.Sockets.SocketAsyncResult.CheckIfThrowDelayedException", Get the TCP error 10061 when using web service in an application, connect with a android emulator to the localhost webservice [C#], c# - Consume soap web service with Xamarin.droid. I usually first try to query the server in a Fiddler2 and When i have right format and answer is OK, than the same query / url try in the target application btw, If my answer to your question is correct / instrumental do not forget mark it as answered. (iOS simulator, separate project on another developers machine, etc.). I'm running it in ASPNET website, on localhost. In this case be sure to double-check the Remote Login settings from step 2 before you investigate any more complicated possibilities. Therefore, an emulated device can't see your development machine or other emulator instances on the network. I want to create a web api application to connect xamarin with android. at System.Net.Http.HttpClientHandler+c__async0.MoveNext () You need to use your server IP address instead of localhost. @Jason same result, connection refused. Also iOS simulators use the desktop localhost, from what I read in the docs, Android is different. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. can you connect to the API using the browser on the device? Not the answer you're looking for? (System.Threading.Tasks.Task task) [0x00047] in Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Enter your password if prompted. Open the Windows Control Panel and click the Windows Defender Firewall icon. I have tried everything from localhost to 10.0.3.2 , 10.0.0.5 to the IP Address that is stated in the android emulator but the connection fails when I use PullAsync() method to get data. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Some further details/things I have tried: Below is an outline of the code I'm using. Cc: Tom Hebert (HCI) tom.hebert@hebert-consulting.com; Comment comment@noreply.github.com Asking for help, clarification, or responding to other answers. Still nothing. at System.Net.Http.HttpClient+c__async0.MoveNext () Looks like this has nothing to do with your code, the address you are trying to reach; "localhost" refers to the DEVICE you are running on. To browse through all the messages, select and open the .svclog file: The .svclog file will open in Microsoft Service Trace Viewer. However, while the certificate has been installed, it's not trusted. Where to start with a large crack the lock puzzle like this? You might notice this messages if you look in the sshd.log. even though I do get a first certificate validation error, but I turned off Certificate validation in POSTMAN to make it work, but when I try to connect to that same URL from the mobile, with the code below I get this error below. /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 The following error is thrown because of this problem: Launch Xcode on the Mac and ensure that your Apple developer account is logged in and your iOS Development Profile is downloaded: This issue may happen when Visual Studio fails to refresh the MEF component cache. Quick Tip: Don't forget to set the base URI. You can access the ASP.NET site running on your PC host using http://10.0.2.2:64642 from the Google SDK emulator. This can be achieved by adding the following configuration to the Platforms\iOS\Info.plist file in your .NET MAUI app project: For more information about ATS, see Preventing Insecure Network Connections on developer.apple.com. I have tried everything from localhost to 10.0.3.2 , 10.0.0.5 to the IP Address that is stated in the android emulator but the connection fails when I use PullAsync() method to get data. To: xamarinhq/app-evolve app-evolve@noreply.github.com AndroidApp.MainActivity+<>c__DisplayClass1_0+d.MoveNext {System.Net.WebException: Error: ConnectFailure (Connection refused) For example you can run open -a TextEdit "$HOME/Desktop/sshd_config" in Terminal. Authenticating a Xamarin.Forms-Client at a ASP.NET MVC Server with SignalR? This is unlikely unless you know you have configured pfctl in the past. Bug #52264 This error can appear if the Login shell in the Advanced Options context menu for the Mac user in System Preferences > Users & Groups is set to a value other than /bin/bash. My Windows machine is wired to the router and the Android phone is USB tethered to the PC. @G.hakim Device is 23, target is 27. System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[TResult].GetResult Check that the input data request are correct. In the code that defines the URL of your local web service in your .NET MAUI app, ensure that the web service URL specifies the HTTPS scheme, and the correct hostname.
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xamarin localhost connection refused 2023